Saw set



June 17, 1930. I COLLIER 1,763,760

SAW SET Filed June 20, 1928 2 Sheets-Sheet 1 June 17, 1930. E; cfi1,763,766

SAW SET Filgd June 20, 1928 2 Sheets-Sheet 2 Patented June 17, 1930FREEMAN E. COLLIER, OF MINNEAPOLIS, MINNESOTA, 'A SSIG'N OR 'I'OFOLEYSAW TOOL COMPANY, INCORPORATED; F MINNEAPOLIS, MINNESQTA, ACORPORATION 01E MINNESOTA Application filed June 20,

My present invention'has for its object to provide an extremely simpleand highly efficient saw set,'and to this end it consists of the noveldevices and combinations of .devices hereinafer described --and definedin the claims. j In the accompanyingdrawings, which illustrate theinvention, like characters indicate like parts throughout the severalviews.

Referring to the drawings:

Fig. 1 is a plan view of the saw set with some parts broken away andother parts sectioned and further illustrating a fragment of a sawsupported in a tooth-setting position; Fig. 2 is a view principally inside elevation with some parts broken away and sectioned; Fig.3 is anelevation of the rear end of the saw set; V i N Fig. 4 is a viewcorresponding toFig. 2

with some parts broken away and sectioned;

Fig. 5is a fragmentary detail View with some parts sectioned on the line5'-5 of Fig. 1;

Fig. 6 is a perspective view of the saw support and positioning devicesand Fig. 7A is a detail view in section taken substantially on the line7-7 of Fig. 6.

The numeral 10 indicates a cast base frame mounted on a benchA andrigidly'secured thereto by screws B. This base frame 10 is providcdatits front with an intermediate upstanding bossed seat 11 in which ananvil 12 is removably mounted but rigidly held by a set screw 13. Theperiphery of the anvil 12 is beveled to afford a tooth-setting surface14 (lo-operating with the tooth-setting surface 14 is a trip hammer:15which extends radially rearward from the anvil 12. This hammer 15 is inthe form of a flat bar set vertically edgewise and mounted in abifurcated bearing 16 on thebase frame 10 and intermediately pivotedthereto at 17 for vertical movement. It will be noted that the bearing16 extends rearward substantially to the respective end of the hammer15, close ly engages the sides thereof andholds said hammer againstlateral angular movements. The head of the hammer 15 at its underlongitudinal edge is beveled to afford a striking sAw SET I 1928. SerialNo. 286,861.

surface 18 and which surface is the tooth-setting surface 14.

A propelling device'for the hammer 15 in the form of a coiled spring 19is anchored to a lug 20 on the base frame 10 below the head end of thehammer 15 and attached to a thumb-nut-equipped bolt 21 attached to thehammer 15 by a clip 22.. This clip 22 is U- shaped with its intermediateportion engaging one side of the hammer 15 and with said hammer closelyfitting between the ears of said clip. The bolt 21 extending throughaligned bores in the ears of the clip 22 on the opposite side of thehammer 15 from the intermediate portion of the clip 22 holds said clipagainst lateral movement from the hammer 15. A. stud 28 in theintermediateportion of the clip 22 extends into a hole in the hammer 15and holdssaid clip against longitudinal shifting movement on saidhammer. Obvi0usly, by adjusting the thumb nut on the bolt 21 the tensionof the propelling base frame 10. The upper end of the operating rod 24is releasably connected to the rear end of the hammer15 by a latch comprising a pair of laterally spaced arms 26, the lower ends of-which arepivoted to a bifurcated head 27 on the upper end of the rod 24 forvertical swinging movement longitudinally of the hammer 15. These arms26 embrace the rear end portions of the sides of the bearing 16 andtheir upper ends.

are connected by a pin 28 which overlies a lock shoulder 29 on the rearend of the ham- .mer 15.

A pair of coiled springs 30 are anchored at 31 to the sides of thebearing 16 and attached at 32 to the outer faces of the arms parallel toa bossed bearing 25 on the rear end of the hammer 15.

26. These coiled springs hold the arms 26 with the pin 28 engaging therear end of the hammer 15 above the lock shoulder 29 as a stop andnormally out of engagement with said shoulder. On the rear edges of thesides of the bearing 16 are cam surfaces 33, for a purpose that willpresently appear. A helical spring 34 encircles the bearing 25 and rod24, is compressed between the base frame 10 and bifurcated head 27 andnormally and yieldingly holds the rod 24 and latch raised or in normalpositions.

A cable connects the lower end of the operating rod 24 to a foottreadle, not shown. Obivously, a downward movement of the opeating rod24 by the'foot treadle, heretofore referred to, will cause the latch pin28 to engage the lock shoulder 29, retract the hammer 15 against theaction of its propelling spring 19 and at the same time compress thespring 34.

During the retracting movement of the hammer 15 by the operating rod 24,the latch pin 28 is brought into contact with the cam surface 33 whichswings the latch rearward and moves its latch pin 28 out of contact withthe lock shoulder 29 and thus releases the hammer 15 to its propellingspring 19 to produce a blow on the anvil 12. When the foot treadle isreleased the spring 34 will lift the operating rod 24 and latch 26 andthe springs 30 will swing said latch forward until stopped by theengagement of its pin 28 with the rear end of the hammer 15 below thelock shoulder 29. During this lifting movement of the operating rod 24the latch pin 28 by its engagement with the rear end of the hammer 15will be directed above the lock shoulder 29 and at which time thesprings 30 will swing said latch forward and position its pin 28 overthe lock shoulder 29.

(lo-operating with the anvil 12 is a combined saw support andpositioning device, the former of which is in the form of a horizontalshelf 36 which extends transversely of the hammer 15 and is integrallyformed with a bed plate 37. In the rear longitudinal edge port-ion ofthe saw support 36 is a segmental notch 38 which affords clearance forthe anvil 12. The bed plate 37 rests on a pair of short posts 39integrally formed with the base frame 10 for forward or rearward slidingmovements in respect to the anvil 12 and longitudinally in respect tothe Formed with the ends of the .bed plate 37 are depending flanges 40that closely engage the outer faces of the relatively wide posts 39 andhold said bed plate against endwise movement transversely of the hammer15.

For securing the bed plate 37 to the posts 39 in different adjustments,there is provided a pair of thumb screws 41 which extend throughhorizontal slots 42 in the flanges 40 and have screw-threaded engagementwith the posts 39. By tightening the screws 41, the flanges 40 may befrictionally clamped against the posts 39 and securely held.

On the rear longitudinal edge of the saw support 36 is an upstanding sawpositioning flange 43 with a gap in its intermediate portion at thenotch 38 to afford clearance for the hammer 15. This positioning flange43 is adapted to be engaged by the points of the teeth of a saw Cresting in a horizontal position on the saw support 36 to position saidsaw for longitudinal movement transversely of said hammer.

Obviously, by adjusting the bed plate 37 in respect to the anvil 12, oneof the teeth of the saw may be positioned longitudinally under thehammer 15 and over the saw-setting surface 14 to vary the depth to whichthe tooth may be set. By longitudinally adjusting the saw on the sawsupport 36 with the points of its teeth in contact with thesawpositioning flange 43, alternate teeth of the saw 0 may be positionedunder the hammer 15 and over the saw-setting surface 14. With the sawthus held, the teeth are all set exactly to the same depth.

The rear longitudinal edge portion of the saw support 36 is downwardlyand rearwardly inclined to the saw-positioning flange 43, as indicatedat 44, to afford clearance for the teeth of the saw C so that the bodyof the saw may be held flat on said support. her positioning the sawlongitudinally on the saw support 36 or in other words, transversely ofthe hammer 15 so that the teeth are automatically positioned directlyunder the hammer 15 by endwise movements of the saw C, there is provideda screw 45 that extends perpendicular to the saw support 36 and has onits lower end a conical point 46 arranged to be engaged by any twoadjacent teeth of said saw.

The screw 45 has screw-threaded engagement with a channel slide 47mounted on a wide rail 48 at the back of one section 01 thesaw-positioning flange 43 and integrally formed therewith, as shown inFi 7. This slide 47 extends horizontally with its flangzes extending theone above the other. The lower flange of the slide 47 is folded aroundthe lower edge portion of the rail 48 to hold said slide against lateralmovement therefrom and a needle point thumb screw 49 havingscrew-threaded engagement with the upper flange of said slide is soarranged that its conical point engages the Saar-positioning flange 43and holds the slide 47 against latcra! movement therefrom but withfreedom for endwise sliding movement on the rail 48. A look nut 50 onthe screw 45 is arranged to impinge against the upper flange of theslide 47 and hold said screw where set. The conical point 46 on thescrew 45 is closely positioned over the surface 44 of the saw support 36so as to extend between any two of the teeth of the saw C when restingon the saw support 36.

Obviously, by moving the saw'C edgewise forward away from thesaw-positioning flange 43 to release the engaged teeth thereof from thescrew point 46 and then moving the saw C first longitudinally and thenrearward until the points of the teeth again engage the sawpositioningflange 43, every other tooth of said saw may be successively positionedover the saw-setting surface 14 and under the hammer 15. After everyother tooth has been set in saw C, said saw is reversed and theintervening teeth set. saw-positioning flange 43 and screw point 46 willposition a saw tooth directly overthe saw-setting surface 14 anddirectly under the hammer 15. By vertically; adjusting the screw 45 itsconical point 46 may be set to be engaged by two adjacent teeth of a sawhaving their points in contact with the sawpositioning flange 43irrespective of the number of teeth in the saw per inch.

After a tooth is properly positioned over the saw-setting surface 14 andunder the hammer 15, the operator, by manipulating the pedal, draws theoperating rod 24 downward and thereby retracts the hammer 15 through itslatch connection and at which time the hammer-propelling spring 19 isplaced under tension. This latch releases the hammer 15 as previouslydescribed, and the propelling spring 19 causes said hammer to deliver ablow on thetooth positioned thereunder with sufficient force to put thedesired set there in. By varying the tension of the propelling spring19, the set of the teeth may be varied.

What I claim is:

1. A saw set comprising a base frame, an anvil, and a bearing on thebase frame, a hammer intermediately pivoted on the bearing forco-operation with the anvil and having a lock shoulder on its rear end,a propelling spring for the hammer, operating connections for retractingthe hammer and tensioning its propelling spring, a latch co-opcratingwith the lock shoulder for connecting the operating connections to thehammer, said hammer having a surface for directing the latch into aposition to be engaged by the lock shoulder during the resetting of saidconnections and latch,'said bearing having a cam surface for releasingthe latch from the lock shoulder during the retracting movement of thehammer, and means for resetting the operating connections and latch.

2. A saw set comprising a base frame, an anvil, and a bearing on thebase frame, a hammer intermediately pivoted on the bearing forco-operation with the the anvil and having a lock shoulder on its rearend, a propelling spring for the hammer, operating connections forretracting the hammer and tensioning its propelling spring, a latch forcon- Obviously thenecting the operating connectionsto the hammer andcomprising a swingable member on the connections and having a pinco-operating with the lock shoulder, said hammer having a surface fordirecting the pin into a position to be engaged by the lock shoulderduring the resetting of said connections and latch, said bearing havinga cam surface for releasing the pin from the lock shoulder during theretracting movement of the hammer,

and yielding means for resetting the operating connections.

3.- The structure defined in claim 2 in which the latch is yieldinglyheld in an operative position. I

4. A saw set comprising a base frame, an anviland a bifurcated bearingon the base frame, a hammer mounted between the sides of the bearing andintermediately pivoted thereto for co-operation with the anvil andhaving a lock shoulder on its rear end, a propelling spring for thehammer, operating connections for retracting the hammer and tensioningits propelling spring, and a latch for connecting'the operatingconnections to the hammer and comprising a pair of swingable arms onsaid connections, embracing the bearing and having a'pin connectingtheir free ends, said hammer havinga cam surface for directing the pininto a position to be en- '55 gaged by the lock shoulder during theresetting of the operating connections and latch, said bearings havingon its edges cam surfaces for releasing the latch from the lock shoulderduring the retracting movement of i the hammer, a spring for resettingthe operating connections, and a second spring yieldingly holding thelatch in an operative position. I g I 5. A saw set comprisinga baseframe, an anvil and a bifurcated bearing on the base frame, said anvilhaving a tooth-setting surface, a hammer comprising a flat bar setvertically edgewise, mounted between the sides of the bearing andintermediately pivoted' thereto, the head of the hammer at its underlongitudinal edge being beveled to afiord a striking surfaceco-operating with the toothsetting surface of the anvil and having alock shoulder on its rear end, a propelling spring tudinal V movement,of an adjusting screw mounted in aligned bores in the ears of the clipoutward of the hammer for holding the dling the hammer held thereonagainst longi- All? clip on the hammer and to which screw the Vpropelling spring is attached.

7. A saw set comprising a base frame, an anvil and a co-operating hammermounted on the base frame, and a bed having a saw-supporting shelfprovided with a saw-positioning flange, said shelf and flange having anintermediate opening for the anvil and arranged to support a saw formovement transversely of the hammer with the points of its teethengaging the flange to guide the saw for longitudinal adjustment inwhich its teeth are successively positioned over the anvil by slidingthe saw longitudinally on the shelf, said bed being mounted on the baseframe for adjustment toward and from the anvil, said shelf adjacent to aflange being downwardly offset to afford clearance for the teeth of thesaw resting on the shelf.

8. The structure defined in claim 7 in further combination with anadjustbale stop device on the flange adapted to be engaged by certain ofthe teeth of the saw to longitudinally position said saw with one of itsteeth on the anvil.

9. A saw set comprising a base frame, an anvil and a co-operating hammermounted 011 the base frame, a saw-support mounted on the base frame andhaving saw-positioning means arranged to be engaged by the points of theteeth of a saw on said support to guide the saw for longitudinaladjustment, a slide mounted on the saw-support for adjustmentlongitudinally thereof, a screw perpendicular to the saw-support havingscrew-threaded engagement with the slide and provided with a taperedpoint arranged to be engaged by two of the teeth of the saw tolongitudinally position the saw with one of its teeth between the anviland the hammer.

In testimony whereof I afiix my signature.

FREEMAN E. COLLIER.

